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Diffstat (limited to 'content/learn/09.lambdas/default.md')
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1 files changed, 309 insertions, 311 deletions
diff --git a/content/learn/09.lambdas/default.md b/content/learn/09.lambdas/default.md index a2e6c24..91d5660 100644 --- a/content/learn/09.lambdas/default.md +++ b/content/learn/09.lambdas/default.md @@ -13,124 +13,124 @@ It can also take parameters. Since it's a computation, it cannot alter the memory by itself, nor can it contain any instructions. **smithy.fate:** +{{< fatecode >}}(fate_version 1) - (fate_version 1) - - (require smithy_inventory.fate) - - (global (lambda text ((cons weapon int))) get_weapon_offer_label) - (global (lambda text ((cons armor int))) get_armor_offer_label) - - (set get_weapon_offer_label - (lambda - ( ((cons weapon int) offer) ) - (let - ( - (weapon (car offer)) - (price (cdr offer)) - ) - (text - Buy "(var weapon.name)" \(attack: (var weapon.attack), - precision: (var weapon.precision)\) for (var price) coins. - ) - ) - ) - ) +(require smithy_inventory.fate) - (set get_armor_offer_label - (lambda - ( ((cons armor int) offer) ) - (let - ( - (armor (car offer)) - (price (cdr offer)) - ) - (text - Buy "(var armor.name)" \(defense: (var armor.defense)\), - for (var price) coins. - ) - ) - ) - ) +(global (lambda text ((cons weapon int))) get_weapon_offer_label) +(global (lambda text ((cons armor int))) get_armor_offer_label) - (define_sequence visit_smithy () - ;; This thing is going to show up every time, which isn't great. - As you approach the smithy, you notice that no one's there. All the - wares are out for selling. It's almost as if this story didn't need - more examples of lengthy dialogues. - (newline) - ;; We'll want to start here the next time we enter this sequence. - You have (var hero.money) coins. - (newline) - What will you look at? - (player_choice - ( - ( Let's see the weapons ) - (jump_to see_weapons) - ) - ( - ( Let's see the armors ) - (jump_to see_armors) - ) - ( - ( Nothing, let's go back to the bar ) - ) - ) +(set get_weapon_offer_label + (lambda + ( ((cons weapon int) offer) ) + (let + ( + (weapon (car offer)) + (price (cdr offer)) ) - - (define_sequence see_weapons () - ;; Still can be improved. - (player_choice - ( - ( (eval get_weapon_offer_label (access smithy_weapons 0)) ) - (visit buy_weapon (access smithy_weapons 0)) - (jump_to visit_smithy) - ) - ( - ( (eval get_weapon_offer_label (access smithy_weapons 1)) ) - (visit buy_weapon (access smithy_weapons 1)) - (jump_to visit_smithy) - ) - ( - ( Nevermind ) - (jump_to visit_smithy) - ) - ) - ) - - (define_sequence see_armors () - ;; Still can be improved. - (player_choice - ( - ( (eval get_armor_offer_label (access smithy_armors 0)) ) - (visit buy_armor (access smithy_armors 0)) - (jump_to visit_smithy) - ) - ( - ( (eval get_armor_offer_label (access smithy_armors 1)) ) - (visit buy_armor (access smithy_armors 1)) - (jump_to visit_smithy) - ) - ( - ( Nevermind ) - (jump_to visit_smithy) - ) - ) + (text + Buy "(var weapon.name)" \(attack: (var weapon.attack), + precision: (var weapon.precision)\) for (var price) coins. ) - - (define_sequence buy_weapon ( ((cons weapon int) weapon) ) - ;; We can't even deny a sell yet... - (set hero.weapon (car weapon)) - Equipped (var hero.weapon.name). - (newline) + ) + ) +) + +(set get_armor_offer_label + (lambda + ( ((cons armor int) offer) ) + (let + ( + (armor (car offer)) + (price (cdr offer)) ) - - (define_sequence buy_armor ( ((cons armor int) armor) ) - ;; We can't even deny a sell yet... - (set hero.armor (car armor)) - Equipped (var hero.armor.name). - (newline) + (text + Buy "(var armor.name)" \(defense: (var armor.defense)\), + for (var price) coins. ) + ) + ) +) + +(define_sequence visit_smithy () + ;; This thing is going to show up every time, which isn't great. + As you approach the smithy, you notice that no one's there. All the wares + are out for selling. It's almost as if this story didn't need more examples + of lengthy dialogues. + (newline) + ;; We'll want to start here the next time we enter this sequence. + You have (var hero.money) coins. + (newline) + What will you look at? + (player_choice + ( + ( Let's see the weapons ) + (jump_to see_weapons) + ) + ( + ( Let's see the armors ) + (jump_to see_armors) + ) + ( + ( Nothing, let's go back to the bar ) + ) + ) +) + +(define_sequence see_weapons () + ;; Still can be improved. + (player_choice + ( + ( (eval get_weapon_offer_label (access smithy_weapons 0)) ) + (visit buy_weapon (access smithy_weapons 0)) + (jump_to visit_smithy) + ) + ( + ( (eval get_weapon_offer_label (access smithy_weapons 1)) ) + (visit buy_weapon (access smithy_weapons 1)) + (jump_to visit_smithy) + ) + ( + ( Nevermind ) + (jump_to visit_smithy) + ) + ) +) + +(define_sequence see_armors () + ;; Still can be improved. + (player_choice + ( + ( (eval get_armor_offer_label (access smithy_armors 0)) ) + (visit buy_armor (access smithy_armors 0)) + (jump_to visit_smithy) + ) + ( + ( (eval get_armor_offer_label (access smithy_armors 1)) ) + (visit buy_armor (access smithy_armors 1)) + (jump_to visit_smithy) + ) + ( + ( Nevermind ) + (jump_to visit_smithy) + ) + ) +) + +(define_sequence buy_weapon ( ((cons weapon int) weapon) ) + ;; We can't even deny a sell yet... + (set hero.weapon (car weapon)) + Equipped (var hero.weapon.name). + (newline) +) + +(define_sequence buy_armor ( ((cons armor int) armor) ) + ;; We can't even deny a sell yet... + (set hero.armor (car armor)) + Equipped (var hero.armor.name). + (newline) +) +{{< /fatecode >}} * `(lambda return_type (param_type0 param_type1 ...))` is the type corresponding to a lambda function returning a value of type `return_type` and taking as @@ -152,215 +152,213 @@ This was a first step toward cleaning up `smithy.fate`. Next, we'll use ## Unchanged Files **data.fate:** - - (fate_version 1) - - (declare_structure weapon - (text name) - (int attack) - (int precision) - ) - - (declare_structure armor - (text name) - (int defense) - ) - - (declare_structure character - (string name) - (int money) - (weapon weapon) - (armor armor) - ) - - (global character hero) - - (set_fields! hero.weapon - (name (text "Legendary" sword)) - (attack 3) - (precision 50) - ) - - (set_fields! hero.armor - (name (text "Refined" attire)) - (defense 1) - ) - - (set hero.money 42) +{{< fatecode >}}(fate_version 1) + +(declare_structure weapon + (text name) + (int attack) + (int precision) +) + +(declare_structure armor + (text name) + (int defense) +) + +(declare_structure character + (string name) + (int money) + (weapon weapon) + (armor armor) +) + +(global character hero) + +(set_fields! hero.weapon + (name (text "Legendary" sword)) + (attack 3) + (precision 50) +) + +(set_fields! hero.armor + (name (text "Refined" attire)) + (defense 1) +) + +(set hero.money 42) +{{< /fatecode >}} **get_a_refill.fate:** - - (fate_version 1) - - (require data.fate) - (require actions.fate) - - (define_sequence lower_price_of_booze - ( - ((ptr int) price_pointer) - (int decrease) - ) - Great! The price of booze just lowered from (at price_pointer) - (set (at price_pointer) - (- - (at price_pointer) - (var decrease) - ) - ) - to (at price_pointer)! - ) - - (define_sequence get_a_refill () - (local int price_of_booze) - - (set price_of_booze 12) - - Staring straight at the barman, you raise your glass and proclaim: - (newline) - "This soon-to-be world savior needs more booze!" - (newline) - The barman's lack of reaction is disappointing, but seeing the beer - being poured does help improve the mood. - (newline) - Satisfied, you hand the barman (var price_of_booze) copper coins. - (visit pay (var price_of_booze)) - (newline) - The barman sighs, then asks: - (prompt_string (ptr hero.name) 2 64 What is your name, then, hero?) - (var hero.name)? - (newline) - The barman looks surprised. - (newline) - (visit lower_price_of_booze (ptr price_of_booze) 4) - (newline) - "I have heard of you, (var hero.name)," the barman exclaims, "I have - a quest for you!" - (newline) - It's your turn to sigh. - (newline) - The barman hands you a bag, and says: - (newline) - "Take this pre-payment and head to the smithy." - (newline) - ) +{{< fatecode >}}(fate_version 1) + +(require data.fate) +(require actions.fate) + +(define_sequence lower_price_of_booze + ( + ((ptr int) price_pointer) + (int decrease) + ) + Great! The price of booze just lowered from (at price_pointer) + (set (at price_pointer) + (- + (at price_pointer) + (var decrease) + ) + ) + to (at price_pointer)! +) + +(define_sequence get_a_refill () + (local int price_of_booze) + + (set price_of_booze 12) + + Staring straight at the barman, you raise your glass and proclaim: + (newline) + "This soon-to-be world savior needs more booze!" + (newline) + The barman's lack of reaction is disappointing, but seeing the beer being + poured does help improve the mood. + (newline) + Satisfied, you hand the barman (var price_of_booze) copper coins. + (visit pay (var price_of_booze)) + (newline) + The barman sighs, then asks: + (prompt_string (ptr hero.name) 2 64 What is your name, then, hero?) + (var hero.name)? + (newline) + The barman looks surprised. + (newline) + (visit lower_price_of_booze (ptr price_of_booze) 4) + (newline) + "I have heard of you, (var hero.name)," the barman exclaims, "I have a quest + for you!" + (newline) + It's your turn to sigh. + (newline) + The barman hands you a bag, and says: + (newline) + "Take this pre-payment and head to the smithy." + (newline) +) +{{< /fatecode >}} **actions.fate:** +{{< fatecode >}}(fate_version 1) - (fate_version 1) +(require data.fate) - (require data.fate) - - (define_sequence pay ( (int cost) ) - (set hero_money - (- (var hero.money) (var cost)) - ) - ) +(define_sequence pay ( (int cost) ) + (set hero_money + (- (var hero.money) (var cost)) + ) +) +{{< /fatecode >}} **falling_asleep.fate:** - - (fate_version 1) - - (require data.fate) - - (define_sequence fall_asleep () - Deciding to break away from the expected storyline, you promptly - fall asleep. - (newline) - ... - (newline) - Upon waking up, your hard-trained reflexes inform you that someone - stole all your money. - (set hero.money 0) - (newline) - This set-back was more than you could take. You give up on this - barely coherent story. - (end) - ) +{{< fatecode >}}(fate_version 1) + +(require data.fate) + +(define_sequence fall_asleep () + Deciding to break away from the expected storyline, you promptly fall + asleep. + (newline) + ... + (newline) + Upon waking up, your hard-trained reflexes inform you that someone stole all + your money. + (set hero.money 0) + (newline) + This set-back was more than you could take. You give up on this barely + coherent story. + (end) +) +{{< /fatecode >}} **main.fate:** - - (fate_version 1) - - Once upon a time, starting a story with these words wasn't considered - a cliche. Starting in a tavern might also not be seen as very - original. Having the main character be an street orphan, raised by - some mysterious sage all to end up as a mercenary with an uncommonly - strong sense of honor probably isn't going to lead to any praises for - novelty either. Maybe you should drink to that. - (newline) - Or maybe you shouldn't. This isn't your first mug. Not your second - either. Drinking to forget that you are a stereotypical hero isn't - going to solve anything. Worse, the alcoholic trait is part of the - image. - (newline) - As you contemplate your own pointless description, your gaze leaves - what turns out to be an already empty glass in your hand and finds the - barman. - - (player_choice - ( - ( Ask the barman for a refill ) - (visit get_a_refill) - ) - ( - ( Fall asleep ) - (jump_to fall_asleep) - ) - ) - - (require get_a_refill.fate) - (require falling_asleep.fate) - - (end) +{{< fatecode >}}(fate_version 1) + +Once upon a time, starting a story with these words wasn't considered a cliche. +Starting in a tavern might also not be seen as very original. Having the main +character be an street orphan, raised by some mysterious sage all to end up as +a mercenary with an uncommonly strong sense of honor probably isn't going to +lead to any praises for novelty either. Maybe you should drink to that. +(newline) +Or maybe you shouldn't. This isn't your first mug. Not your second either. +Drinking to forget that you are a stereotypical hero isn't going to solve +anything. Worse, the alcoholic trait is part of the image. +(newline) +As you contemplate your own pointless description, your gaze leaves what turns +out to be an already empty glass in your hand and finds the barman. + +(player_choice + ( + ( Ask the barman for a refill ) + (visit get_a_refill) + ) + ( + ( Fall asleep ) + (jump_to fall_asleep) + ) +) + +(require get_a_refill.fate) +(require falling_asleep.fate) + +(end) +{{< /fatecode >}} **smithy_inventory.fate:** - (fate_version 1) - - (require data.fate) - - (global (list (cons weapon int)) smithy_weapons) - (global (list (cons weapon int)) smithy_armors) - - (add! - (cons - (set_fields (default weapon) - (name (text An Iron Rod)) - (attack 10) - (precision 70) - ) - 176 - ) - smithy_weapons - ) - (add! - (cons - (set_fields (default weapon) - (name (text A Magnificient Brick)) - (attack 6) - (precision 90) - ) - 110 - ) - smithy_weapons - ) - - (add! - (cons - (set_fields (default armor) - (name (text A raincoat?!)) - (defense 7) - ) - 160 - ) - smithy_armors - ) - (add! - (cons - (set_fields (default armor) - (name (text A nice cape)) - (defense 3) - ) - 50 - ) - smithy_armors - ) +{{< fatecode >}}(fate_version 1) + +(require data.fate) + +(global (list (cons weapon int)) smithy_weapons) +(global (list (cons weapon int)) smithy_armors) + +(add! + (cons + (set_fields (default weapon) + (name (text An Iron Rod)) + (attack 10) + (precision 70) + ) + 176 + ) + smithy_weapons +) +(add! + (cons + (set_fields (default weapon) + (name (text A Magnificient Brick)) + (attack 6) + (precision 90) + ) + 110 + ) + smithy_weapons +) + +(add! + (cons + (set_fields (default armor) + (name (text A raincoat?!)) + (defense 7) + ) + 160 + ) + smithy_armors +) +(add! + (cons + (set_fields (default armor) + (name (text A nice cape)) + (defense 3) + ) + 50 + ) + smithy_armors +) +{{< /fatecode >}} |