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interpolated strings, v2 #510

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3c665c0
interpolated strings, v2
WebFreak001 Oct 29, 2023
bdd87a6
support i", i`, iq{ and istring postfixes
WebFreak001 Oct 29, 2023
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131 changes: 129 additions & 2 deletions src/dparse/ast.d
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Original file line number Diff line number Diff line change
Expand Up @@ -73,6 +73,9 @@ shared static this()
typeMap[typeid(TypeofExpression)] = 46;
typeMap[typeid(UnaryExpression)] = 47;
typeMap[typeid(XorExpression)] = 48;
typeMap[typeid(InterpolatedStringExpression)] = 49;
typeMap[typeid(InterpolatedStringText)] = 50;
typeMap[typeid(InterpolatedStringVariable)] = 51;
}

/// Describes which syntax was used in a list of declarations in the containing AST node
Expand Down Expand Up @@ -167,6 +170,19 @@ abstract class ASTVisitor
case 46: visit(cast(TypeofExpression) n); break;
case 47: visit(cast(UnaryExpression) n); break;
case 48: visit(cast(XorExpression) n); break;
// skip 49, 50, 51 (used for InterpolatedStringPart)
default: assert(false, __MODULE__ ~ " has a bug");
}
}

/// ditto
void dynamicDispatch(const InterpolatedStringPart n)
{
switch (typeMap.get(typeid(n), 0))
{
case 49: visit(cast(InterpolatedStringExpression) n); break;
case 50: visit(cast(InterpolatedStringText) n); break;
case 51: visit(cast(InterpolatedStringVariable) n); break;
default: assert(false, __MODULE__ ~ " has a bug");
}
}
Expand Down Expand Up @@ -289,6 +305,10 @@ abstract class ASTVisitor
/** */ void visit(const Initialize initialize) { initialize.accept(this); }
/** */ void visit(const Initializer initializer) { initializer.accept(this); }
/** */ void visit(const InterfaceDeclaration interfaceDeclaration) { interfaceDeclaration.accept(this); }
/** */ void visit(const InterpolatedString interpolatedString) { interpolatedString.accept(this); }
/** */ void visit(const InterpolatedStringExpression interpolatedStringExpression) { interpolatedStringExpression.accept(this); }
/** */ void visit(const InterpolatedStringText interpolatedStringText) { interpolatedStringText.accept(this); }
/** */ void visit(const InterpolatedStringVariable interpolatedStringVariable) { interpolatedStringVariable.accept(this); }
/** */ void visit(const Invariant invariant_) { invariant_.accept(this); }
/** */ void visit(const IsExpression isExpression) { isExpression.accept(this); }
/** */ void visit(const KeyValuePair keyValuePair) { keyValuePair.accept(this); }
Expand Down Expand Up @@ -426,7 +446,7 @@ template visitIfNotNull(fields ...)
}
}

mixin template OpEquals(bool print = false)
private mixin template OpEquals(extraFields...)
{
override bool opEquals(Object other) const
{
Expand All @@ -443,6 +463,9 @@ mixin template OpEquals(bool print = false)
if (field != obj.tupleof[i])
return false;
}
static foreach (field; extraFields)
if (mixin("this." ~ field ~ " != obj." ~ field))
return false;
return true;
}
return false;
Expand Down Expand Up @@ -2318,6 +2341,109 @@ final class InterfaceDeclaration : BaseNode
mixin OpEquals;
}

///
final class InterpolatedString : BaseNode
{
override void accept(ASTVisitor visitor) const
{
mixin (visitIfNotNull!(parts));
}

/** */ InterpolatedStringPart[] parts;

inout(Token) startQuote() inout pure nothrow @nogc @safe scope
{
return tokens.length ? tokens[0] : Token.init;
}

inout(Token) endQuote() inout pure nothrow @nogc @safe scope
{
return tokens.length && tokens[$ - 1].type == tok!"istringLiteralEnd"
? tokens[$ - 1]
: Token.init;
}

/// '\0'/'c'/'w'/'d' for `i""`, `i""c`, `i""w` and `i""d` respectively.
char postfixType() inout pure nothrow @nogc @safe scope
{
auto end = endQuote.text;
auto endChar = end.length ? end[$ - 1] : ' ';
switch (endChar)
{
case 'c':
case 'w':
case 'd':
return endChar;
default:
return '\0';
}
}

mixin OpEquals!("startQuote.text", "postfixType");
}

///
abstract class InterpolatedStringPart : BaseNode
{
}

///
final class InterpolatedStringText : InterpolatedStringPart
{
override void accept(ASTVisitor visitor) const
{
}

/// The token containing the plain text part in its `.text` property.
inout(Token) text() inout pure nothrow @nogc @safe scope
{
return tokens.length ? tokens[0] : Token.init;
}

mixin OpEquals!("text.text");
}

///
final class InterpolatedStringVariable : InterpolatedStringPart
{
override void accept(ASTVisitor visitor) const
{
}

/// The dollar token.
inout(Token) dollar() inout pure nothrow @nogc @safe scope
{
return tokens.length == 2 ? tokens[0] : Token.init;
}

/// The variable name token.
inout(Token) name() inout pure nothrow @nogc @safe scope
{
return tokens.length == 2 ? tokens[1] : Token.init;
}

mixin OpEquals!("name.text");
}

///
final class InterpolatedStringExpression : InterpolatedStringPart
{
override void accept(ASTVisitor visitor) const
{
mixin (visitIfNotNull!(expression));
}

/** */ Expression expression;

/// The dollar token.
inout(Token) dollar() inout pure nothrow @nogc @safe scope
{
return tokens.length ? tokens[0] : Token.init;
}

mixin OpEquals;
}

///
final class Invariant : BaseNode
{
Expand Down Expand Up @@ -2798,7 +2924,7 @@ final class PrimaryExpression : ExpressionNode
typeofExpression, typeidExpression, arrayLiteral, assocArrayLiteral,
expression, dot, identifierOrTemplateInstance, isExpression,
functionLiteralExpression,traitsExpression, mixinExpression,
importExpression, vector, arguments));
importExpression, vector, arguments, interpolatedString));
}
/** */ Token dot;
/** */ Token primary;
Expand All @@ -2818,6 +2944,7 @@ final class PrimaryExpression : ExpressionNode
/** */ Type type;
/** */ Token typeConstructor;
/** */ Arguments arguments;
/** */ InterpolatedString interpolatedString;
mixin OpEquals;
}

Expand Down
27 changes: 27 additions & 0 deletions src/dparse/astprinter.d
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Original file line number Diff line number Diff line change
Expand Up @@ -582,6 +582,33 @@ class XMLPrinter : ASTVisitor
output.writeln("</interfaceDeclaration>");
}

override void visit(const InterpolatedString interpolatedString)
{
output.writeln("<interpolatedString startQuote=\"",
xmlAttributeEscape(interpolatedString.startQuote.text),
"\" endQuote=\"",
xmlAttributeEscape(interpolatedString.endQuote.text),
"\">");
foreach (part; interpolatedString.parts)
dynamicDispatch(part);
output.writeln("</interpolatedString>");
}

override void visit(const InterpolatedStringText interpolatedStringText)
{
output.writeln("<text>", xmlEscape(interpolatedStringText.text.text), "</text>");
}

override void visit(const InterpolatedStringVariable interpolatedStringVariable)
{
output.writeln("<variable>", xmlEscape(interpolatedStringVariable.name.text), "</variable>");
}

override void visit(const InterpolatedStringExpression interpolatedStringExpression)
{
visit(interpolatedStringExpression.expression);
}

override void visit(const Invariant invariant_)
{
output.writeln("<invariant>");
Expand Down
37 changes: 37 additions & 0 deletions src/dparse/formatter.d
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Original file line number Diff line number Diff line change
Expand Up @@ -2012,6 +2012,36 @@ class Formatter(Sink)
}
}

void format(const InterpolatedString interpolatedString)
{
put(interpolatedString.startQuote.text);
foreach (part; interpolatedString.parts)
{
if (cast(InterpolatedStringText) part) format(cast(InterpolatedStringText) part);
else if (cast(InterpolatedStringVariable) part) format(cast(InterpolatedStringVariable) part);
else if (cast(InterpolatedStringExpression) part) format(cast(InterpolatedStringExpression) part);
}
put(interpolatedString.endQuote.text);
}

void format(const InterpolatedStringText interpolatedStringText)
{
put(interpolatedStringText.text.text);
}

void format(const InterpolatedStringVariable interpolatedStringVariable)
{
put("$");
put(interpolatedStringVariable.name.text);
}

void format(const InterpolatedStringExpression interpolatedStringExpression)
{
put("$(");
format(interpolatedStringExpression.expression);
put(")");
}

void format(const Invariant invariant_, const Attribute[] attrs = null)
{
debug(verbose) writeln("Invariant");
Expand Down Expand Up @@ -2571,6 +2601,7 @@ class Formatter(Sink)
Type type;
Token typeConstructor;
Arguments arguments;
InterpolatedString interpolatedString;
**/

with(primaryExpression)
Expand Down Expand Up @@ -2605,6 +2636,7 @@ class Formatter(Sink)
else if (vector) format(vector);
else if (type) format(type);
else if (arguments) format(arguments);
else if (interpolatedString) format(interpolatedString);
}
}

Expand Down Expand Up @@ -4348,4 +4380,9 @@ do
{
}
}}, `a == b && c == d`);
testFormatNode!(VariableDeclaration)(`T x = i"hello";`);
testFormatNode!(VariableDeclaration)(`T x = i" hello ";`);
testFormatNode!(VariableDeclaration)(`T x = i" hello $name ";`);
testFormatNode!(VariableDeclaration)(`T x = i" hello $(name) ";`);
testFormatNode!(VariableDeclaration)(`T x = i" hello $( name ) ";`, `T x = i" hello $(name) ";`);
}
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